diff --git a/src/modules/SX127x/SX1278.cpp b/src/modules/SX127x/SX1278.cpp
index 317c38ee..685fe175 100644
--- a/src/modules/SX127x/SX1278.cpp
+++ b/src/modules/SX127x/SX1278.cpp
@@ -314,6 +314,11 @@ int16_t SX1278::setDataShaping(uint8_t sh) {
 
   // check modulation
   if(SX127x::_ook) {
+    // we're in OOK mode, the only thing we can do is disable
+    if(sh == RADIOLIB_SHAPING_NONE) {
+      return(setDataShapingOOK(0));
+    }
+
     return(RADIOLIB_ERR_INVALID_MODULATION);
   }